99. and Zimmerman was a prescription drug user

According to the report, prior to the shooting Zimmerman had been prescribed Adderall and Temazepam, medications that can cause side effects such as agitation and mood swings, but in fewer than 10 percent of patients.

http://www.drugs.com/temazepam.htmlTemazepam is used to treat insomnia symptoms, such as trouble falling or staying asleep.
Temazepam may also be used for other purposes not listed in this medication guide.

http://www.drugs.com/adderall.htmlAdderall is a central nervous system stimulant. It affects chemicals in the brain and nerves that contribute to hyperactivity and impulse control. Adderall is used to treat narcolepsy and attention deficit hyperactivity disorder (ADHD).

Both are potentially addictive. And neither should be taken with alcohol. But of course they didn't bother to do an alcohol test on the killer, did they?